OpenStax, Algebra and Trigonometry 2e §13.4 Series and Their Notations · Exercise 55 · Probability · Counting & chance

Series and Their Notations · Exercise 55

The sum of terms $50 - k^{2}$ from $k = x$ through $7$ is $115.$ What is x?

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OpenStax, Algebra and Trigonometry 2e · §13.4 Series and Their Notations · Exercise 55

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